Composite insulation board

The utility model relates to the technical field of insulation boards, in particular to a composite insulation board which comprises an insulation board body, sound insulation boards are fixedly installed on the two sides of the insulation board body, a frame base board is fixedly installed on the outer sides of the sound insulation boards, frame grooves are formed in the frame base board, and protruding strips are formed in the frame grooves at intervals in a protruding mode. Compared with an existing heat preservation plate, the heat preservation plate has the sound insulation and noise reduction functions on both internal sound and external sound, the plate body can be installed on the wall according to the use requirements through the arrangement of the two side frame base plates, meanwhile, decorative plates and installation filling media which users like can be installed, and due to the existence of the protruding strips, the contact face is large, and the heat preservation effect is good. And the insta